New understanding on reduction mechanism and alloying process of rich manganese slag: Phase formation and morphological evolution

Liu, Zhenggen; Zhang, Lifeng; Wang, Mingyu; Zhao, Zichuan; Gao, Lihua; Chu, Mansheng

doi:10.1016/j.powtec.2020.11.071

Cited by 8 publications

(1 citation statement)

References 36 publications

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“…Mn-Fe slag is a kind of slag with very high CaO content (>40 wt%). The high CaO content of Mn-Fe slag is believed to be related to the smelting process of Mn-Fe alloy, in which a large amount of CaO is added to adjust the ratio of CaO/SiO 2 (1.3~1.5) [29]. Although this process improved the smelting efficiency of Mn-Fe alloys, it also led to an increase in CaO content in Mn-Fe slag.…”

Section: Mn-fe-slag-based Glass-ceramicsmentioning

confidence: 99%

Research Progress on Iron- and Steelmaking Iste Slag-Based Glass-Ceramics: Preparation and GHG Emission Reduction Potentials

Wei,

Liu,

et al. 2023

Sustainability

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Promoted by carbon neutrality and solid iste policies, iron- and steelmaking iste slag (ISWS)-based glass-ceramics have drawn attention because of their contribution to achieving the net-zero carbon emissions goal for the iron- and steelmaking industry. However, a holistic estimation of the preparation, property and GHG (greenhouse gas) emission abatement of ISWS-based glass-ceramics is still under exploration. In this paper, research progress on preparing glass-ceramics from ISWS discharged from the traditional iron- and steelmaking industry is reviewed. Then, the influence of ISWS’s chemical characteristics on the preparation of glass-ceramics and the products’ performance are discussed. In addition, the potential of GHG emission reduction related to the promotion of ISWS-based glass-ceramics is measured. It is found that ISWS-based glass-ceramics can avoid 0.87–0.91 tons of CO2 emissions compared to primary resource routes. A scenario simulation is also conducted. If the technology could be fully applied in the ironmaking and steelmaking industries, the results suggest that 2.07 and 0.67 tons of indirect CO2 reductions can be achieved for each ton of crude steel production from blast furnace–basic oxygen furnace (BF-BOF) and electric arc furnace (EAF) routes, respectively. Finally, a “dual promotion” economic mode based on national policy orientation and the high demands on metallurgical iste slag (MWS)-based glass-ceramics is proposed, and the application prospects of MWS-based glass-ceramics are examined. These application prospects will deepen the fundamental understanding of glass-ceramic properties and enable them to be compounded with other functional materials in various new technologies.

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Section: Mn-fe-slag-based Glass-ceramicsmentioning

confidence: 99%

Research Progress on Iron- and Steelmaking Iste Slag-Based Glass-Ceramics: Preparation and GHG Emission Reduction Potentials

Wei,

Liu,

et al. 2023

Sustainability

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Study on Efficient Use of High‐Manganese Pig Iron

Zhao

Yang

et al. 2023

steel research int.

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The smelting process of high‐manganese pig iron is studied to determine ways to efficiently utilize the by‐product of manganese‐rich slag. This process consists of two stages: 1) demanganese and carbon retention and 2) decarbonization and dephosphorization. In the first stage, oxygen is supplied at 0.5–2.0 Nm3 t−1 min−1. The temperature is controlled between 1300 and 1400 °C by adding iron ore to the molten bath. Ultimately, high‐manganese slag, which contains more than 50% manganese oxide and semisteel with 3.2% carbon, is produced. In the second stage, oxygen is supplied at 2.0−5.0 Nm3 t−1 min−1 and slag‐forming materials are added to the molten bath for the dephosphorization and desulfurization of the hot metal. Consequently, the iron oxide, manganese oxide, and silicon oxide contents of the high‐manganese slag and the carbon, manganese, phosphorus, and sulfur contents of the semisteel are 10.8–15.3%, 70–77%, and 3–7%, and 3.2–4.2%, 0.3–1.0%, 0.12–0.22%, and 0.01–0.024%, respectively. The main mineral phases of high‐manganese slag, 2MnO·SiO2 and FeO·MnO·SiO2, are suitable for the preparation of high‐carbon ferromanganese raw materials. After further smelting, clean molten steel containing 0.03−0.08%, 0.08−0.20%, 0.005−0.02%, and 0.01−0.024% carbon, manganese, phosphorus, and sulfur, respectively, is obtained.

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Synergetic Utilization of Zinc-Bearing Dust by Carbothermic Reduction-Roasting Process: Phase Transformation and Morphological Evolution

Jin

Gao

Zhang

et al. 2022

J. Sustain. Metall.

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New understanding on reduction mechanism and alloying process of rich manganese slag: Phase formation and morphological evolution

Cited by 8 publications

References 36 publications

Research Progress on Iron- and Steelmaking Iste Slag-Based Glass-Ceramics: Preparation and GHG Emission Reduction Potentials

Research Progress on Iron- and Steelmaking Iste Slag-Based Glass-Ceramics: Preparation and GHG Emission Reduction Potentials

Study on Efficient Use of High‐Manganese Pig Iron

Synergetic Utilization of Zinc-Bearing Dust by Carbothermic Reduction-Roasting Process: Phase Transformation and Morphological Evolution

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